In reality, a measure of the total opposition to current flow in an alternating current circuit, made up of two components, ohmic resistance and reactance, and usually represented in complex notation as Z = R + iX, where R is the ohmic resistance and X is the reactance. In this car audio, typically we use impedance as only the resistance, to make speaker selection easier. This is how many "Ohms" a speaker "has".

This tells you the size of the coil of wire attached to the bottom of the speaker cone or driver diaphragm. The Voice Coil becomes an electromagnet when an audio signal is applied and interacts with a permanent magnet which causes the cone or diaphragm to vibrate.

Description

The BTA6200 model has been discontinued and was replaced with the BTA6250D
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Cramped for SPACE, but still hungry for BASS?If you’re one of those people who have to have the highest performance in everything you do, then the BTA6200 Bass Tube is the ones for you. With a 200 watt MOSFET amplifier, adjustable crossover, high power handling woofers, and monstrous voice coils, these Amplified Bazooka’s will get things really rumbling in your car.

The perfect accessory to our highest performance 6 inch Amplified Bass Tube is the RBCM, allowing you to control the amount of bass from the driver's seat, simply add the optional plug in Remote Bass Control Module (RBCM)!

As with all Bass Tubes Enclosures , the BTA6200 comes with straps to keep the sub securely mounted, while still making removal quick and easy if you need even more cargo room. Optional Chrome-Plated UMS Brackets give a flashier look, as well as a more secure, permanent mounting when removal isn't a problem.